<template>
  <div>
      <!-- 面包屑 -->
 <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
</el-breadcrumb>

<el-card>
<el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

<el-steps :active="activeIndex - 0" finish-status="success" align-center="">
    <el-step title="基本信息"></el-step>
    <el-step title="商品参数"></el-step>
    <el-step title="商品属性"></el-step>
    <el-step title="商品图片"></el-step>
    <el-step title="商品内容"></el-step>
    <el-step title="完成"></el-step>
</el-steps>

 <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave"  @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <!-- 选择商品分类的级联选择框 -->
                            <el-cascader expandTrigger='hover' v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange" clearable>
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :key="item.attr_id" :label="item.attr_name" v-for="item in manyTableData">
                            <el-checkbox-group v-model="item.attr_vals">
                               <el-checkbox border :label="item1" :key="i" v-for="(item1, i) in item.attr_vals"></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                          <!-- 循环生成静态属性 -->
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                        :action="actionUrl"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        :on-success="handleSuccess"
                        :headers="headersObj"
                        list-type="picture">
                        <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>

            <!-- 预览图片对话框 -->
            <el-dialog
            title="图片预览"
            :visible.sync="picVisible"
            width="50%">
            <img :src="zsUrl" alt="" class="yulanPic">
            </el-dialog>

</el-card>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      cateList: [],
      addForm: {
        goods_name: '',
        goods_price: 1,
        goods_weight: 1,
        goods_number: 1,
        goods_cat: [],
        pics: [],
        attrs: [],
        // 商品的详情介绍
        goods_introduce: ''
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 配置级联菜单中数据如何展示
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      actionUrl: '//127.0.0.1:8888/api/private/v1/upload',
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      zsUrl: '',
      picVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return this.addForm.goods_cat
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      // 在tab栏切换之前触发，两个形参为切换前，后的tab栏name
      if (oldActiveName === '0') {
      // 在第一个标签页的时候
        if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('请选择商品的分类')
          return false
        } else if (this.addForm.goods_name.trim() === '') {
          this.$message.error('请输入商品名称')
          return false
        } else if (this.addForm.goods_price === 0) {
          this.$message.error('请输入商品价格')
          return false
        } else if (this.addForm.goods_weight === 0) {
          this.$message.error('请输入商品重量')
          return false
        } else if (this.addForm.goods_number === 0) {
          this.$message.error('请输入商品数量')
          return false
        }
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        // 发送请求获取动态参数
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        // 发送请求获取静态属性
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }

        this.onlyTableData = res.data
      }
    },
    handlePreview (file) {
      this.picVisible = true
      this.zsUrl = file.response.data.url
    },
    handleRemove (file) {
      const removeUrl = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(v => {
        return v === removeUrl
      })
      this.addForm.pics.splice(i, 1)
    //   console.log(this.addForm)
    },
    handleSuccess (res) {
      const picUrl = {
        pic: res.data.tmp_path
      }
      this.addForm.pics.push(picUrl)
    //   console.log(this.addForm)
    },
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项!')

        // 将addForm进行深拷贝，避免goods_cat数组转换字符串之后导致级联选择器报错
        const form = _.cloneDeep(this.addForm)
        // 将goods_cat从数组转换为"1,2,3"字符串形式
        form.goods_cat = form.goods_cat.join(',')
        // 处理attrs数组，数组中需要包含商品的动态参数和静态属性
        // 将manyTableData（动态参数）处理添加到attrs
        this.manyTableData.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') })
        })
        // 将onlyTableData（静态属性）处理添加到attrs
        this.onlyTableData.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals })
        })
        console.log(form)
        // 发送请求完成商品的添加,商品名称必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success('添加商品成功')
        // 编程式导航跳转到商品列表
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped lang="less">
.el-steps{
    margin:15px 0;
}
.el-step__title{
    font-size: 13px;
}
.el-checkbox {
    margin: 10px 10px 10px 0 !important;
}
.yulanPic {
    width: 100%;
    height: 100%;
}
.btnAdd{
  margin-top:15px;
}
</style>
